AppealHoundBy Vantar Group
Denial code · updated 22 October 2026

CO 96: Non-Covered Charge

Not a covered charge under this plan.

Read the RARC. If it points at a documentation gap rather than the benefit itself, it is appealable.

Usually lost CO PR 96

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What CO 96 means

CO: Contractual obligation. The provider absorbs it and cannot bill the patient.

So the balance cannot move to the patient. Either the appeal recovers it or the practice absorbs it. That makes the appeal decision the whole decision on this line.

The same code, a different prefix. 96 also arrives as PR 96. The reason for the denial is the same. The prefix decides who pays for it, so the next step is not the same. If your remit says PR 96, read that page instead.

Is It Worth Appealing?

Usually lost. Recoverable only with unusual evidence. Triage by dollar value.

Why It Fires

In the order we see it.

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  1. A benefit exclusion in the patient's plan.

  2. A missing or invalid ABN on a Medicare claim.

  3. The RARC beside it often names the real reason, which may be documentation rather than the benefit.

How to Appeal CO 96, Step by Step

Read the RARC. If it points at a documentation gap rather than the benefit itself, it is appealable.

  1. 1Step 1: Read the remark code. Find the remark code printed next to CO 96 on the 835 or EOB. It says what the payer wants back. The usual ones are N130, N115, N30.
  2. 2Step 2: Find the cause. Match the denial to one of the 3 causes in Why It Fires above, and fix that one.
  3. 3Step 3: Take the first action. Read the RARC. If it points at a documentation gap rather than the benefit itself, it is appealable.
  4. 4Step 4: Attach the documentation. A signed ABN, which moves the balance to patient responsibility. Whatever the RARC actually asks for, if it points at a documentation gap.
  5. 5Step 5: Send the appeal before the deadline. Send it to the payer with the claim, the denial and the documentation, inside the payer's appeal window. See what an appeal letter must contain and the filing limits by payer.

The common mistake. Do not treat this as final until you have read the RARC. It frequently hides an appealable reason behind a non-covered label.

Free: the Denial Code Appeal Playbook. 53 codes on one sheet: appeal, fix and resubmit, or let it go, and what to attach. Get the playbook

CO 96 description

Not a covered charge under this plan.

Not a covered charge under this plan. So the balance cannot move to the patient. Either the appeal recovers it or the practice absorbs it. That makes the appeal decision the whole decision on this line.

This is our plain-English wording, not the official X12 text. X12 asserts copyright over the published descriptions, so we write our own and say what it means for the money rather than restating the code.

Where this comes from. This is our own reading of the code, not the payer's and not a copy of the standards text. We classify it from how these denials actually resolve. Where we are unsure, we say so rather than guessing.

The Remark Code Beside It

The adjustment code says the claim was reduced. The remark code printed next to it says why, and it is the one that tells you what to send back.

RemarkWhat it means
N130The member's plan restricts this service, and the payer has pointed you at the benefit document instead of naming the restriction.
N115The decision came from a Local Coverage Determination, the regional Medicare policy that says when this service is covered.
N30The patient was not eligible for this particular service on that date. That is narrower than not being covered at all, and the difference matters.
N59The payer has pointed you at the provider manual rather than naming the rule it applied.
N180The payer says what you billed does not qualify for the billing category you put it under.

Related Codes

Your Questions Answered

What does CO 96 mean?

Not a covered charge under this plan. Contractual obligation. The provider absorbs it and cannot bill the patient.

Can you appeal CO 96?

Usually lost. Read the RARC. If it points at a documentation gap rather than the benefit itself, it is appealable.

Why does CO 96 happen?

A benefit exclusion in the patient's plan. A missing or invalid ABN on a Medicare claim. The RARC beside it often names the real reason, which may be documentation rather than the benefit.

What documentation wins a CO 96 appeal?

A signed ABN, which moves the balance to patient responsibility. Whatever the RARC actually asks for, if it points at a documentation gap.

How do I appeal a CO 96 denial?

Step 1: Read the remark code. Find the remark code printed next to CO 96 on the 835 or EOB. It says what the payer wants back. Step 2: Find the cause. Match the denial to one cause: A benefit exclusion in the patient's plan. A missing or invalid ABN on a Medicare claim. The RARC beside it often names the real reason, which may be documentation rather than the benefit. Step 3: Take the first action. Read the RARC. If it points at a documentation gap rather than the benefit itself, it is appealable. Step 4: Attach the documentation. A signed ABN, which moves the balance to patient responsibility. Whatever the RARC actually asks for, if it points at a documentation gap. Step 5: Send the appeal before the deadline. Send it to the payer with the claim, the denial and the documentation, inside the payer's appeal window.

Most searched: CO 97 · OA 23 · PR 204 · CO 109 · CO 197 · CO 45 · CO 50

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